It can be anything! An apex, subdomain, or even a URL.

Results forbookstack.mk1technology.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2023-12-07T18:22:50.498	2023-12-07T17:22:49	2024-03-06T17:22:48	bookstack.mk1technology.com	bookstack.mk1technology.com	C=US, O=Let's Encrypt, CN=R3
2023-12-07T18:22:49.824	2023-12-07T17:22:49	2024-03-06T17:22:48	bookstack.mk1technology.com	bookstack.mk1technology.com	C=US, O=Let's Encrypt, CN=R3
2023-09-28T20:31:31.013	2023-09-28T19:31:30	2023-12-27T19:31:29	bookstack.mk1technology.com	bookstack.mk1technology.com	C=US, O=Let's Encrypt, CN=R3
2023-09-28T20:31:30.81	2023-09-28T19:31:30	2023-12-27T19:31:29	bookstack.mk1technology.com	bookstack.mk1technology.com	C=US, O=Let's Encrypt, CN=R3
2023-07-30T17:04:01.236	2023-07-30T16:04:00	2023-10-28T16:03:59	bookstack.mk1technology.com	bookstack.mk1technology.com	C=US, O=Let's Encrypt, CN=R3
2023-07-30T17:04:00.448	2023-07-30T16:04:00	2023-10-28T16:03:59	bookstack.mk1technology.com	bookstack.mk1technology.com	C=US, O=Let's Encrypt, CN=R3